The Wildest Card in Britain’s Wild Election

It must have been a particularly distasteful bite of crow for David Cameron, the Conservative prime minister of Britain. A decade ago, as the populist United Kingdom Independence Party (UKIP) began its slow rise, Mr. Cameron derided its supporters as “fruitcakes and loonies and closet racists.” Now, with parliamentary elections on May 7 and UKIP polling near 12%, Mr. Cameron is pleading for the support of would-be Kippers. To have much hope of remaining at No. 10 Downing Street, he needs the fruitcakes.